I recently upgraded our site from SF 10 to SF19.  Immediately upon upgrade we began receiving both memory and CPU allotment issues, to the point where our site is now recycling every five minutes.  We moved to a more powerful web host that upped our memory allocation from 300Mb to 1 Gb, but are encountering the same issue.  Since Storefront is a key element of our site we are feeling a bit trapped.  I assume that the engineering of the newer version is requiring the additional resources.  Is there a path for downgrading versions so we can get back to a functioning site again?